Eeh. It might be perception, but I feel like it was the other way around — around the time iPhone came out, a lot of apps eschewed compliance in favour of achieving clearer identity. I think that cleared the way for electron — I actually vaguely remember some people talking about using html-based apps because they made achieving a specific visual design easier, not because of the portability benefits.
And for example AFAIK the new Apple Music app is using a web view for some parts of itself, and as much as I like having "light" apps, I generally prefer interacting with Electron UIs over most QT apps.
The first one isn't Mac like --- the menu bar doesn't go on the top of the window. I don't necessarily think that's great, but that's the way it should be on a Mac.
not dead but... here's for instance how Wireshark looked on macOS when it was using GTK :
https://blog.wireshark.org/wp-content/uploads/2013/10/osx-x1...
and here's how it looks now that it is using Qt :
https://news-cdn.softpedia.com/images/news2/wireshark-3-0-re...